Trailhead App Customization Specialist superbadge error

While working on App Customization Specialist superbadge at seccond challenge I always get this error There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: HRZCQEPDClose errorsI have created and used a new playground for this superbadge first time and second time i used an org but still get the same error